As he says, the views in the Middle East are that the Sunni Saddam Hussein was a check on Shia Iran. But he's right that we shouldn't use one dictatorship to check another. He gave a big speech to that effect in Chicago in 1999.
Blair is the one politician I've changed my mind about. During the 90s, I believed he was a triangulator of the Clinton mold, and he was in a way. After 9/11 he took a lot heat for standing with America, but we are better off for it.